期刊
LANGMUIR
卷 27, 期 15, 页码 9621-9629出版社
AMER CHEMICAL SOC
DOI: 10.1021/la2011452
关键词
-
资金
- Comunidad de Madrid [S2009/ENE-1743]
- Spanish Ministry of Science and Innovation [ENE2010-15381]
Functionalized carbon nanotubes were used as a support for PtCo nanoparticles. Their performance as electrocatalysts for the electrooxidation of methanol was evaluated by cyclic voltammetry and in situ FTIR reflectance spectroscopy. The onset potentials for both the electrooxidation of methanol and the production of CO2 shifted to less positive values for catalysts prepared with more oxygen groups on the support. Furthermore, the production of CO2 was higher on catalysts prepared with functionalized carbon nanotubes. The functional groups play two different but complementary roles. On the one hand, they help to stabilize smaller PtCo particles of ca. 3 nm. On the other hand, they provide the -OH groups necessary for the total oxidation of methanol to CO2 at potentials less positive than on nonfunctionalized supports. Remarkably, the consumption of carboxylic acid groups along with the production of water is observed in the infrared spectra of the functionalized supports recorded during the electrooxidation of methanol. This observation suggests that the -OH groups of the support can also react with methanol, forming water and an ester.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据